
Integrate the meter with the control system
Frequency=Flow
The
Frequency=Flow
option is used to customize the frequency output for your application when you do
not know appropriate values for
Units/Pulse
or
Pulses/Unit
.
If you specify
Frequency=Flow
, you must provide values for
Rate Factor
and
Frequency Factor
:
Rate Factor
The maximum flow rate that you want the frequency output to report. Above
this rate, the transmitter will report
A110: Frequency Output Saturated
.
Frequency Factor
A value calculated as follows:
where:
T
Factor to convert selected time base to seconds
N
Number of pulses per flow unit, as configured in
the receiving device
The resulting
Frequency Factor
must be within the range of the frequency output (0 to 10,000 Hz):
• If
Frequency Factor
is less than 1 Hz, reconfigure the receiving device for a higher pulses/unit setting.
• If
Frequency Factor
is greater than 10,000 Hz, reconfigure the receiving device for a lower pulses/unit
setting.
Tip
If
Frequency Output Scale Method
is set to
Frequency=Flow
, and
Frequency Output Maximum Pulse Width
is set to a
non-zero value, Micro Motion recommends setting
Frequency Factor
to a value less than
200 Hz
.
t
Example: Configure
Frequency=Flow
You want the frequency output to report all flow rates up to 2000 kg/min.
The frequency receiving device is configured for 10 pulses/kg.
Solution:
Set parameters as follows:
•
Rate Factor
:
2000
•
Frequency Factor
:
333.33
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Micro Motion 9739 MVD Transmitters